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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: ConvertedList.html 602 2015-01-05 18:49:18Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.util;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.base.Converter;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.google.common.collect.Iterators;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.AbstractList;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.ArrayList;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.Collection;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.Iterator;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.List;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>/**<a name="line.19"></a>
<span class="sourceLineNo">020</span> * Provides a transformed view of a wrapped {@link List} using a strictly invertable {@link Converter}.<a name="line.20"></a>
<span class="sourceLineNo">021</span> *<a name="line.21"></a>
<span class="sourceLineNo">022</span> * @param &lt;E&gt; element type of this list<a name="line.22"></a>
<span class="sourceLineNo">023</span> * @param &lt;W&gt; element type of the wrapped list<a name="line.23"></a>
<span class="sourceLineNo">024</span> */<a name="line.24"></a>
<span class="sourceLineNo">025</span>public class ConvertedList&lt;E, W&gt; extends AbstractList&lt;E&gt; {<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>    private final List&lt;W&gt; list;<a name="line.27"></a>
<span class="sourceLineNo">028</span>    private final Converter&lt;E, W&gt; converter;<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>    /**<a name="line.30"></a>
<span class="sourceLineNo">031</span>     * Constructor.<a name="line.31"></a>
<span class="sourceLineNo">032</span>     *<a name="line.32"></a>
<span class="sourceLineNo">033</span>     * @param list wrapped list<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * @param converter element converter<a name="line.34"></a>
<span class="sourceLineNo">035</span>     * @throws IllegalArgumentException if either parameter is null<a name="line.35"></a>
<span class="sourceLineNo">036</span>     */<a name="line.36"></a>
<span class="sourceLineNo">037</span>    public ConvertedList(List&lt;W&gt; list, Converter&lt;E, W&gt; converter) {<a name="line.37"></a>
<span class="sourceLineNo">038</span>        if (list == null)<a name="line.38"></a>
<span class="sourceLineNo">039</span>            throw new IllegalArgumentException("null list");<a name="line.39"></a>
<span class="sourceLineNo">040</span>        if (converter == null)<a name="line.40"></a>
<span class="sourceLineNo">041</span>            throw new IllegalArgumentException("null converter");<a name="line.41"></a>
<span class="sourceLineNo">042</span>        this.list = list;<a name="line.42"></a>
<span class="sourceLineNo">043</span>        this.converter = converter;<a name="line.43"></a>
<span class="sourceLineNo">044</span>    }<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    public Converter&lt;E, W&gt; getConverter() {<a name="line.46"></a>
<span class="sourceLineNo">047</span>        return this.converter;<a name="line.47"></a>
<span class="sourceLineNo">048</span>    }<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span>    @Override<a name="line.50"></a>
<span class="sourceLineNo">051</span>    public E get(int index) {<a name="line.51"></a>
<span class="sourceLineNo">052</span>        final W value = this.list.get(index);<a name="line.52"></a>
<span class="sourceLineNo">053</span>        return value != null ? this.converter.reverse().convert(value) : null;<a name="line.53"></a>
<span class="sourceLineNo">054</span>    }<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span>    @Override<a name="line.56"></a>
<span class="sourceLineNo">057</span>    public int size() {<a name="line.57"></a>
<span class="sourceLineNo">058</span>        return this.list.size();<a name="line.58"></a>
<span class="sourceLineNo">059</span>    }<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>    @Override<a name="line.61"></a>
<span class="sourceLineNo">062</span>    public boolean isEmpty() {<a name="line.62"></a>
<span class="sourceLineNo">063</span>        return this.list.isEmpty();<a name="line.63"></a>
<span class="sourceLineNo">064</span>    }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    @Override<a name="line.66"></a>
<span class="sourceLineNo">067</span>    public E set(int index, E elem) {<a name="line.67"></a>
<span class="sourceLineNo">068</span>        final W welem = elem != null ? this.converter.convert(elem) : null;<a name="line.68"></a>
<span class="sourceLineNo">069</span>        final W prev = this.list.set(index, welem);<a name="line.69"></a>
<span class="sourceLineNo">070</span>        return prev != null ? this.converter.reverse().convert(prev) : null;<a name="line.70"></a>
<span class="sourceLineNo">071</span>    }<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>    @Override<a name="line.73"></a>
<span class="sourceLineNo">074</span>    public void add(int index, E elem) {<a name="line.74"></a>
<span class="sourceLineNo">075</span>        final W welem = elem != null ? this.converter.convert(elem) : null;<a name="line.75"></a>
<span class="sourceLineNo">076</span>        this.list.add(index, welem);<a name="line.76"></a>
<span class="sourceLineNo">077</span>    }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>    @Override<a name="line.79"></a>
<span class="sourceLineNo">080</span>    public boolean addAll(int index, Collection&lt;? extends E&gt; elems) {<a name="line.80"></a>
<span class="sourceLineNo">081</span>        final ArrayList&lt;W&gt; welems = new ArrayList&lt;&gt;();<a name="line.81"></a>
<span class="sourceLineNo">082</span>        for (E elem : elems)<a name="line.82"></a>
<span class="sourceLineNo">083</span>            welems.add(elem != null ? this.converter.convert(elem) : null);<a name="line.83"></a>
<span class="sourceLineNo">084</span>        return this.list.addAll(index, welems);<a name="line.84"></a>
<span class="sourceLineNo">085</span>    }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>    @Override<a name="line.87"></a>
<span class="sourceLineNo">088</span>    @SuppressWarnings("unchecked")<a name="line.88"></a>
<span class="sourceLineNo">089</span>    public boolean contains(Object obj) {<a name="line.89"></a>
<span class="sourceLineNo">090</span>        W wobj = null;<a name="line.90"></a>
<span class="sourceLineNo">091</span>        if (obj != null) {<a name="line.91"></a>
<span class="sourceLineNo">092</span>            try {<a name="line.92"></a>
<span class="sourceLineNo">093</span>                wobj = this.converter.convert((E)obj);<a name="line.93"></a>
<span class="sourceLineNo">094</span>            } catch (ClassCastException e) {<a name="line.94"></a>
<span class="sourceLineNo">095</span>                return false;<a name="line.95"></a>
<span class="sourceLineNo">096</span>            }<a name="line.96"></a>
<span class="sourceLineNo">097</span>        }<a name="line.97"></a>
<span class="sourceLineNo">098</span>        return this.list.contains(wobj);<a name="line.98"></a>
<span class="sourceLineNo">099</span>    }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span>    @Override<a name="line.101"></a>
<span class="sourceLineNo">102</span>    @SuppressWarnings("unchecked")<a name="line.102"></a>
<span class="sourceLineNo">103</span>    public int indexOf(Object obj) {<a name="line.103"></a>
<span class="sourceLineNo">104</span>        W wobj = null;<a name="line.104"></a>
<span class="sourceLineNo">105</span>        if (obj != null) {<a name="line.105"></a>
<span class="sourceLineNo">106</span>            try {<a name="line.106"></a>
<span class="sourceLineNo">107</span>                wobj = this.converter.convert((E)obj);<a name="line.107"></a>
<span class="sourceLineNo">108</span>            } catch (ClassCastException e) {<a name="line.108"></a>
<span class="sourceLineNo">109</span>                return -1;<a name="line.109"></a>
<span class="sourceLineNo">110</span>            }<a name="line.110"></a>
<span class="sourceLineNo">111</span>        }<a name="line.111"></a>
<span class="sourceLineNo">112</span>        return this.list.indexOf(wobj);<a name="line.112"></a>
<span class="sourceLineNo">113</span>    }<a name="line.113"></a>
<span class="sourceLineNo">114</span><a name="line.114"></a>
<span class="sourceLineNo">115</span>    @Override<a name="line.115"></a>
<span class="sourceLineNo">116</span>    @SuppressWarnings("unchecked")<a name="line.116"></a>
<span class="sourceLineNo">117</span>    public int lastIndexOf(Object obj) {<a name="line.117"></a>
<span class="sourceLineNo">118</span>        W wobj = null;<a name="line.118"></a>
<span class="sourceLineNo">119</span>        if (obj != null) {<a name="line.119"></a>
<span class="sourceLineNo">120</span>            try {<a name="line.120"></a>
<span class="sourceLineNo">121</span>                wobj = this.converter.convert((E)obj);<a name="line.121"></a>
<span class="sourceLineNo">122</span>            } catch (ClassCastException e) {<a name="line.122"></a>
<span class="sourceLineNo">123</span>                return -1;<a name="line.123"></a>
<span class="sourceLineNo">124</span>            }<a name="line.124"></a>
<span class="sourceLineNo">125</span>        }<a name="line.125"></a>
<span class="sourceLineNo">126</span>        return this.list.lastIndexOf(wobj);<a name="line.126"></a>
<span class="sourceLineNo">127</span>    }<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span>    @Override<a name="line.129"></a>
<span class="sourceLineNo">130</span>    public void clear() {<a name="line.130"></a>
<span class="sourceLineNo">131</span>        this.list.clear();<a name="line.131"></a>
<span class="sourceLineNo">132</span>    }<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
<span class="sourceLineNo">134</span>    @Override<a name="line.134"></a>
<span class="sourceLineNo">135</span>    public E remove(int index) {<a name="line.135"></a>
<span class="sourceLineNo">136</span>        final W welem = this.list.remove(index);<a name="line.136"></a>
<span class="sourceLineNo">137</span>        return welem != null ? this.converter.reverse().convert(welem) : null;<a name="line.137"></a>
<span class="sourceLineNo">138</span>    }<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span>    @Override<a name="line.140"></a>
<span class="sourceLineNo">141</span>    public Iterator&lt;E&gt; iterator() {<a name="line.141"></a>
<span class="sourceLineNo">142</span>        return Iterators.transform(this.list.iterator(), this.converter.reverse());<a name="line.142"></a>
<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>    @Override<a name="line.145"></a>
<span class="sourceLineNo">146</span>    public List&lt;E&gt; subList(int min, int max) {<a name="line.146"></a>
<span class="sourceLineNo">147</span>        return new ConvertedList&lt;E, W&gt;(this.list.subList(min, max), this.converter);<a name="line.147"></a>
<span class="sourceLineNo">148</span>    }<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
<span class="sourceLineNo">150</span>    @Override<a name="line.150"></a>
<span class="sourceLineNo">151</span>    protected void removeRange(int min, int max) {<a name="line.151"></a>
<span class="sourceLineNo">152</span>        this.list.subList(min, max).clear();<a name="line.152"></a>
<span class="sourceLineNo">153</span>    }<a name="line.153"></a>
<span class="sourceLineNo">154</span>}<a name="line.154"></a>
<span class="sourceLineNo">155</span><a name="line.155"></a>




























































</pre>
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